Dbacks hold off slow-starting Giants

SAN FRANCISCO — One day after Buster Posey took a fastball to the helmet, the Arizona Diamondbacks’ best player turned the other cheek. Jeff Samardzija threw a 96.7 mph fastball that drilled Paul Goldschmidt in the hindquarters in the first inning. There were no warnings issued, and no escalation of tensions as Goldschmidt jogged to first…